1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05175322d556b8a5bbf867dacf1133ff611583adf1dd018c372adc5f3ff37760. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c738f02-c23f-4562-8ee4-51a0f05e9e48.json and https://artists.proofprofile.net/proofs/artist/4c738f02-c23f-4562-8ee4-51a0f05e9e48.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc523c97d579871a27664240a4c0952687c12348a961a85a4500646ddedee7c44. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA719901522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46f8477375986817d9635a26989be62af8f9fffd467fe6f8a271dd45fa2f443. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA710203780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683d36317c1678867cc1fe4411aa9d19bf7b959dce8b13702b8e9007d2c703ae. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA710409660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80e1b0d4f326b743952f6837bd39860f227a9b4779b4398f6de274416c0da04. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA710409670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc076840ff59d9e4ce8886fdb469c76082f8d97b0e17f632623d90ea0a39792b7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA710409680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a47bdff3294e637dd44fedc341dff91ed53a68e3018224f3300b66e68b16514. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA719800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab649623e425dbf3905f3d87affc0e723a77c41f0c3f22fbef525ac3a5aa23bd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA719800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da813ff2cf19f6df26b14096b3348b025bfcb7f27289801b7fd6924955fa752. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA710405701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df0d9c4625ba4974ac3017030e15d0455a22ae0af932a4d02d1b4a5085c1900. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA719901462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefb97c09123d9014ef2da1749ba399398ba26c6fa51de4d1c4c2250f25a59ab. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA719800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55db37236e79ff0438497a8854ac724ca946303f0740e148a0a37148440ec5bd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA719800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c81fe19f108c082357269bbf606b70c389fe8127d0a2ee652893b3717f35b6f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA719800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaeb57a7debddec9c719a98813e53ec82e7cd896767dae758b5b536634987d9f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA719800080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24a57bb8ed690aa98524f9830fefcd757c784f210be7a5c878e5559440e2142. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA719800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3206ffe75ce56597f68469c61e8c673f6b96ed5b30d99c4baa124eade0791a77. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA710405708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167ade15012ad1cbfed5a0e4548e5c3a1fa2f9f1c9873c446845fb311824110d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA710304660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2aeece9a9379548804b3ae48942ce620519c96c32ce0499b3f37eec5483b44. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA710304700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45d9d921115e9559a6e9aa9ee9ce19fd92f76064ab0b8a42a1cd2d9a95efee5. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA711002080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493f40492f9d97516168b6a042cf44a4987a92f30d7e99aad4c16c97f0dcd59a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA711002090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a6b54ee2cbdfb5b354dd94a0ccab7c03d2a2af298072a3bd8e767b40e80973. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA711002100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6311014ef9d15649f88777b85c1ba8554ddd4b8f9e43da3ad8aead505027532a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA711002110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c47d0d395b0423efacb11312a4319561a768133a4913b0155a6d392ba98015. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA711002120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071a3d35aac3ad70bf76466229018863e008a253fc636df77b4ab8f0b975c2e5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA711002130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c186cdae2fb15a238cfdf7cd547c1d2dac8a3d6138c5ddc93fac972a25de13. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA711002140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0a79f822727f3ca82482766195ec0b56fb89a290436cc71645de6b26d30c7b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA711002150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b960d5dca0d842dfb3a87b05eda9a88ef16a95528db7df275949a2f413fc2e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA711002170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813f6266d89f83d75a05eeb835658f2f989e6094350cff1782e562f29dd598fd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA711002180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e684d2fb158c628a5e4e435b1745fc3d80dac187c8ed8df43079ae8a366d7af. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA711002190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0532142e2ecdeec13fed75a1ed1760f7d866d239a0065002cce420b6b13531. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA711700403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba43e8a3a4821b44d3a47f09582b47563ecaf693189bc91d8a6dd57aad9b65c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA711900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1b53ca5d01e6deec1c04787e20560c5d4a070649a03cea31c820ce739a65a1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA711900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5441625fc88f6ec0c7745816765dbfb8d128f74a1339b7aa049770e53231cc50. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA711900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a15dfa76025f38663267ada730d54d506e19b3094b3f5b57b01fb1635f99420. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA72225839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef97f375869a7993794ecfbe7ad44f053a0b4848880ebf13f88b2e00f8d288f3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA72220562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ba13f5b40c814d9398e114b59ce108d46a37369677f1ecb1bcf3e474faab20. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2018337.